package com.itheima.controller;

import com.baomidou.mybatisplus.core.conditions.query.LambdaQueryWrapper;
import com.baomidou.mybatisplus.extension.plugins.pagination.Page;
import com.itheima.common.R;
import com.itheima.pojo.Employee;
import com.itheima.service.EmployeeService;
import lombok.extern.slf4j.Slf4j;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.util.DigestUtils;
import org.apache.commons.lang.StringUtils;
import org.springframework.web.bind.annotation.*;

import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import java.time.LocalDateTime;

@Slf4j
@RestController
@RequestMapping("/employee")
public class EmployeeController {
    @Autowired
    private EmployeeService employeeService;

    /**
     * 后台系统登录
     * @param request
     * @param employee
     * @return
     */
    @PostMapping("/login")
    public R<Employee> login(HttpServletRequest request,@RequestBody Employee employee){
        //将页面提交的密码加密
        String password = employee.getPassword();
        password = DigestUtils.md5DigestAsHex(password.getBytes());
        //根据用户名查询用户信息
        LambdaQueryWrapper<Employee> lqw = new LambdaQueryWrapper<>();
        lqw.eq(Employee::getUsername, employee.getUsername());
        Employee emp = employeeService.getOne(lqw);
        //如果没有查询到则返回登录失败结果
        if (emp==null){
            return R.error("登陆失败");
        }
        //密码比对，如果不一致则返回登录失败结果
        if (!emp.getPassword().equals(password)){
            return R.error("登陆失败");
        }
        //查看员工状态，如果为已禁用状态，则返回员工已禁用结果
        if (emp.getStatus()==0){
            return R.error("账号已禁用");
        }
        //用户状态正常。登录成功。
        request.getSession().setAttribute("employee",emp.getId());
        return R.success(emp);
    }

    /**
     * 后台系统退出
     * @param request
     * @return
     */
    @PostMapping("/logout")
    public R<String> logout(HttpServletRequest request){
        request.getSession().removeAttribute("employee");
        return R.success("退出成功");
    }

    /**
     * 添加员工
     * @param request
     * @param employee
     * @return
     */
    @PostMapping
    public R<String> save(HttpServletRequest request,@RequestBody Employee employee){
        log.info("新增员工，员工信息：{}",employee.toString());
        //设置初始密码123456，需要进行md5加密处理
        employee.setPassword(DigestUtils.md5DigestAsHex("123456".getBytes()));
//        employee.setCreateTime(LocalDateTime.now());
//        employee.setUpdateTime(LocalDateTime.now());
        //获取当前登录用户的id
        Long empId = (Long) request.getSession().getAttribute("employee");
//        employee.setCreateUser(empId);
//        employee.setUpdateUser(empId);
        employeeService.save(employee);
        return R.success("添加员工成功");
    }

    /**
     * 员工信息分页查询
     * @param page
     * @param pageSize
     * @param name
     * @return
     */
    @GetMapping("/page")
    public R<Page> page(int page,int pageSize,String name){
        log.info("page={},pageSize={},name={}",page,pageSize,name);
        //构造分页构造器
        Page pageInfo = new Page(page, pageSize);
        //构建条件构造器
        LambdaQueryWrapper<Employee> wrapper = new LambdaQueryWrapper<>();
        //添加过滤条件
        wrapper.like(StringUtils.isNotEmpty(name), Employee::getName,name);
        //添加排序条件
        wrapper.orderByDesc(Employee::getUpdateTime);
        //执行查询
        employeeService.page(pageInfo,wrapper);
        return R.success(pageInfo);
    }

    /**
     * 启动和禁用
     * @param request
     * @param employee
     * @return
     */
    @PutMapping
    public R<String> update(HttpServletRequest request,@RequestBody Employee employee){
        log.info(employee.toString());
        Long emp = (Long) request.getSession().getAttribute("employee");
//        employee.setUpdateTime(LocalDateTime.now());
//        employee.setUpdateUser(emp);
        employeeService.updateById(employee);
        return R.success("员工修改成功");
    }

    /**
     * 根据id查询
     * @param id
     * @return
     */
    @GetMapping("/{id}")
    public R<Employee> getById(@PathVariable Long id){
        log.info("根据id查询员工信息");
        Employee byId = employeeService.getById(id);
        if (byId!=null){
            return R.success(byId);
        }
        return R.error("没有查询到对应员工信息");
    }
}
